Effect of vegetable oil fortified feeds on the content of fatty acids in breast and thigh muscles in broiler chickens
2010
Krejci-Treu, T.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny | Strakova, E.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny | Suchy, P.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny | Herzig, I.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny
The main objective of this work was to compare the effect of six vegetable oils added to feeding mixtures administered to broiler chickens on the content of major fatty acids in chicken meat. The experiment started with 90 one-day-old Ross 308 meat hybrid male chickens that were divided into six groups. Chickens were fed complete feeding mixtures for the prefattening (BR1), fattening (BR2), and post-fattening (BR3) periods. The BR1 feeding mixture was administered to chickens aged 1-10 days, the BR2 feeding mixture was given from Day 11 to Day 30, and the BR3 feeding mixture was then administered until Day 42. The BR1 feeding mixture was supplemented with soybean oil. BR2 and BR3 feeding mixtures were fortified with soybean oil (SO), rapeseed oil (RO), sunflower oil (SFO), flaxseed oil (FO), olive oil (OO), and evening primrose oil (EPO). The vegetable oils used differed by the composition of fatty acids, particularly by the content of oleic acid, linoleic acid, alpha-linolenic acid. The use of the above-described experimental diets had a significant effect on the content of fatty acids in the fat from breast and thigh muscles. The content of alpha-linolenic acid in breast and thigh muscles of FO broilers (21.16 g/100 g of oil and 17.13 g/100 g of oil, respectively) significantly increased. The highest content of linoleic acid in breast and thigh muscles was found in EPO chickens (59.13 g/100 g and 51.71 g/100 g). A significant increase in the level of oleic acid was detected in both breast and thigh muscles of OO broilers (52.44 g/100 g and 43.70 g/100 g of oil). No significant variation was found in the content of palmitic acid and palmitooleic acid. The levels of oleic acid, linoleic acid and alpha-linolenic acid in feeding mixtures correlated with those found in breast and thigh muscles (r = 0.88; 0.94 and 0.99; r = 0.99; 0.98 and 0.99).
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